body{
	padding: 0;
	margin:0;
}
.content{
	width: 90%;
	margin:20px auto;
}
header{
	text-align: center;
	font-family: '黑体';
	font-size: 2.0em;
	margin-bottom: 20px;
}
section{
	line-height: 1.8em;
	letter-spacing:1.5px;
	text-indent:28px;
}
div h4{
	height: 20px;
	margin-top: 0px;
	margin-bottom:8px; 
	text-align: center;
}
section div{
	float: left;
	width: 41%;
	margin:4%;
	padding: 10px 0px;
	text-align: center;
	border: 1px dotted gray;
}
.more{
	width: 100%;
	margin: 5px;
}